diff --git a/src/actions/HeroAction.lua b/src/actions/HeroAction.lua
index f70499f..0af8cd1 100644
--- a/src/actions/HeroAction.lua
+++ b/src/actions/HeroAction.lua
@@ -1303,7 +1303,7 @@ function _M.saveGeniusTreeRpc(agent, data)
 
 	if not hero then  print("hero is nil") return 0 end
 
-	if wakeL > hero:getProperty("wakeL") then return 1 end
+	if wakeL and wakeL > hero:getProperty("wakeL") then return 1 end
 
 	local genius = hero:saveGeniusTree(wakeL, awake)
 	if #genius == 0 then
--
libgit2 0.21.2